Java in a Nutshell, 5th Edition [Electronic resources]

This class provides an immutable object wrapper around the boolean primitive type. Note that the trUE and FALSE constants are Boolean objects; they are not the same as the TRue and false boolean values. As of Java 1.1, this class defines a Class constant that represents the boolean type. booleanValue( ) returns the boolean value of a Boolean object. The class method getBoolean( ) retrieves the boolean value of a named property from the system property list. The static method valueOf( ) parses a string and returns the Boolean object it represents. Java 1.4 added two static methods that convert primitive boolean values to Boolean and String objects. In Java 5.0, the parseBoolean( ) method behaves like valueOf( ) but returns a primitive boolean value instead of a Boolean object.

Prior to Java 5.0, this class does not implement the Comparable interface.

public final class

Boolean implements Serializable, Comparable<Boolean> { // Public Constructors public

Boolean (String

s ); public

Boolean (boolean

value ); // Public Constants public static final Boolean

FALSE ; public static final Boolean

TRUE ;

1.1 public static final Class<Boolean>

TYPE ; // Public Class Methods public static boolean

getBoolean (String

name );

5.0 public static boolean

parseBoolean (String

s );

1.4 public static String

toString (boolean

b );

1.4 public static Boolean

valueOf (boolean

b ); public static Boolean

valueOf (String

s ); // Public Instance Methods public boolean

booleanValue ( ); // Methods Implementing Comparable

5.0 public int

compareTo (Boolean

b ); // Public Methods Overriding Object public boolean

equals (Object

obj ); public int

hashCode ( ); public String

toString ( ); }